[llvm] [VPlan] Improve code using m_One (NFC) (PR #161686)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-vectorizers

@llvm/pr-subscribers-llvm-transforms

Author: Ramkumar Ramachandra (artagnon)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/161686.diff


1 Files Affected:

- (modified) llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp (+1-6) 


``````````diff
diff --git a/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp b/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
index acdb37996a443..67e33cf2e4d7a 100644
--- a/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
@@ -3346,12 +3346,7 @@ void VPlanTransforms::convertToConcreteRecipes(VPlan &Plan) {
         VectorStep = Builder.createWidenCast(CastOp, VectorStep, IVTy);
       }
 
-      [[maybe_unused]] auto *ConstStep =
-          ScalarStep->isLiveIn()
-              ? dyn_cast<ConstantInt>(ScalarStep->getLiveInIRValue())
-              : nullptr;
-      assert(!ConstStep || ConstStep->getValue() != 1);
-      (void)ConstStep;
+      assert(!match(ScalarStep, m_One()) && "Expected non-unit scalar-step");
       if (TypeInfo.inferScalarType(ScalarStep) != IVTy) {
         ScalarStep =
             Builder.createWidenCast(Instruction::Trunc, ScalarStep, IVTy);

``````````

</details>


https://github.com/llvm/llvm-project/pull/161686